To review: Put paint on paper. While it dries, put paint on a second sheet of paper. While it dries, cover at least 3/4 of the first sheet with new paint. While it dries, do the same with sheet #2. Repeat two more times.
I could literally feel discomfort in my body as I moved through the exercise, especially by layer 3.
Here's how the second sheet played out. The paints I picked had low opacity, making the experience of this sheet different from the first.
Having "fulfilled" the requirements of the exercise, I now plan to use these two sheets as starts for paintings that I'll develop through to completion.